Dual's DXRM57BT digital media receiver adds the convenience of built-in Bluetooth connectivity. You can make and take calls, stream Internet radio, or just enjoy your own music library with a wide variety of Apple / Android smartphones or other music players. You can also check out your favorite AM/FM stations, plug a thumb drive full of music into the front-panel charging USB port, or connect a music player to the front aux input. The built-in amplifier and four preset EQ curves makes it all sounds great. It looks great, too, with a white-on-black 7-character LCD display that's easy to read day/ night. The included wireless remote adds convenience, while two sets of preamp outputs come in handy when expanding your system with an outboard amp.